ind = 22
function init()
    mode(1)
    map = {}
    col = {}
    for i=0,1199 do
        map[i] = 32
        col[i] = 0x0f
    end
    map[ind] = 65
    sel_col = 0x0f
    sel_chr = 65
end

blink=30

function update()
    if btn(KEY_TAB) then
        draw_picker()
        update_picker()
    else    
        draw_map()
        --update_map()
    end
end

function draw_picker()
    for y=0,15 do
		for x=0,15 do
			poke(x+y*40, x+y*16)
        	poke(1200+x+y*40, sel_col)
		end
	end
    for i=0,15 do 
        poke(1840+i, i<<4)
        poke(1880+i, i<<4)
        poke(640+i, 32)
        poke(680+i, 32)
    end
    poke(1840, 15) poke(1880, 15)
    poke(640+(sel_col&0xf), 203)
    poke(680+(sel_col>>4), 203)
    local mx, my = mousex(), mousey()

	if mx<16 then
		if my<16 then
			poke(1200+(mx+my*40), 0x4e)
			print(mx+my*40, 16, 13)
		elseif my>=16 then
			poke(mx+my*40, 144)
		end
	end
end

function update_picker()
    local mx, my = mousex(), mousey()
    if mousebutton(1) then
		if mx<16 then
			if my<16 then
				sel_chr = mx+my*16
			else
				if my == 16 then
					sel_col = (sel_col & 0xf0) + mx
				elseif my == 17 then 
					sel_col = (sel_col & 0x0f) + (mx << 4)
				end 
			end
		end
    end
end

function draw_map()
    for i=0,1199 do
        poke(i, map[i])
        poke(1200+i, col[i])
    end

    local mx, my = mousex(), mousey()
    if mousebutton(1) then
        map[mx+my*40] = sel_chr
        col[mx+my*40] = sel_col
    end
    if btn(KEY_SPACE) then
        sel_chr = peek(mx+my*40)
        sel_col = peek(1200+mx+my*40)
    end

    if btnp(KEY_UP) then for i=40,1199 do map[i-40]=map[i]col[i-40]=col[i] end end
    if btnp(KEY_DOWN) then for i=1159,0,-1 do map[i+40]=map[i]col[i+40]=col[i] end end
    if btnp(KEY_LEFT) then for i=0,1198 do map[i]=map[i+1]col[i]=col[i+1] end end
    if btnp(KEY_RIGHT) then for i=1199,1,-1 do map[i]=map[i-1]col[i]=col[i-1] end end

    blink = blink - 1
    if blink < 30 then
        if blink==0 then blink = 60 end
        local mx, my = mousex(), mousey()
        local c = peek(1200+(mx+my*40))
        poke(1200+(mx+my*40), c~0xff)
    end

	if btn(KEY_S) then
		fileout("scr.bin", 0, 2400);
	elseif btn(KEY_L) then
		filein("scr.bin", 0, 2400);
		for i=0,1199 do
			map[i] = peek(i)
			col[i] = peek(1200+i)
		end
	
	end
end